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Home theater enthusiasts have had seven speakers in their systems for a decade now, but only now is Hollywood finally catching up. Last Saturday, Dolby Laboratories feted the release of the Megamind Blu-ray Disc, which it says is the first movie released in 7.1-channel sound in theaters and on Blu-ray. A screening of the Blu-ray Disc in the company's technically unassailable theater was preceded by a discussion with Erik Aadahl, one of the movie's two supervising sound editors.

I can tell you in one paragraph how to set up a pair of small speakers, but I could write a book about setting up subwoofers. It’s the most challenging aspect of home audio because the resonances in a room tend to stress certain bass frequencies and strangle others.